Question

更新

（2014-JUN-03）调试器建议在malloc_error_break

上设置断点

(malloc: *** error for object 0x11b102dc0: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug)

只是，我不确定我在追踪中看到了什么;似乎没有可行的迹象表明问题是什么。

（2014-JUN-05）在该计划中启用僵尸和malloc现在正在生成以下消息：

2014-06-05 09:55:14.048 *** -[GPUImageFramebuffer activateFramebuffer]: message sent to deallocated instance 0x2e9ffaf90.

显然有一些糟糕的垃圾收集正在进行中？

在模拟器中运行时，我在GPUImage实现中收到崩溃日志。特别是：

崩溃＃1

- (void)dealloc
{
    [self destroyFramebuffer];
}

...在GPUImageFrameBuffer.m Line 109上我收到SIGABRT错误：

malloc: *** error for object 0x10ac7df60: pointer being freed was not allocated

崩溃＃2

[self activateFramebuffer];

...在GPUImageFrameBuffer.m Line 343上我收到了EXC_BAD_ACCESS错误（但没有任何上下文）。

研究这些，它们似乎是过早解除分配的帧缓冲区引用（在处理完成之前）。有趣的是，它们似乎根本没有出现在我正在测试的设备上。

我需要知道这是否是预期的模拟器行为或是否异常，我应该花更多时间研究问题并调整我的实施？

为了它的价值，我抓住一个UIImage，将它转换为GPUImagePicture（我可能需要重新考虑？），然后返回UIImage。这是我的方法的精简副本：

- (UIImage*)processWithFilters
{
    // Mutable array of filters, for dynamic iteration through only those filters which require applying
    NSMutableArray* filterChain = [NSMutableArray new];

    GPUImagePicture *source = [[GPUImagePicture alloc] initWithImage:self];

    CustomFilter* customFilter;
    customFilter = [[CustomFilter alloc] initWithLookupImageName:@"ImageNamedSomething.jpg"];
    [filterChain addObject:customFilter];

    GPUImageBrightnessFilter *brightnessFilter = [GPUImageBrightnessFilter new];
    brightnessFilter.brightness = 0.5;
    [filterChain addObject:brightnessFilter];

    GPUImageContrastFilter *contrastFilter = [GPUImageContrastFilter new];
    contrastFilter.contrast = 0.5;
     [filterChain addObject:contrastFilter];

    GPUImageSaturationFilter *saturationFilter = [GPUImageSaturationFilter new];
    saturationFilter.saturation = 1.2;
    [filterChain addObject:saturationFilter];

    GPUImageHazeFilter *hazeFilter = [GPUImageHazeFilter new];
    hazeFilter.distance = -0.2;
    hazeFilter.slope = -0.2;
    [filterChain addObject:hazeFilter];

    GPUImageWhiteBalanceFilter *whiteBalanceFilter = [GPUImageWhiteBalanceFilter new];
    whiteBalanceFilter.temperature = 6000;
    [filterChain addObject:whiteBalanceFilter];

    __block UIImage* returnImage;
    if (filterChain.count > 0)
    {
        [filterChain enumerateObjectsUsingBlock:^(id filter, NSUInteger idx, BOOL *stop) {
            if (idx == 0) {
                [source addTarget:filter];
            }

            if (idx < filterChain.count - 1) {
                GPUImageFilter *nextFilter = [filterChain objectAtIndex:idx + 1];
                [filter addTarget:nextFilter];
            }

            [filter useNextFrameForImageCapture];

            if (idx == filterChain.count - 1) {
                [source processImage];
                returnImage = [filter imageFromCurrentFramebuffer];
            }
        }];
        kAppIsProcessingImage = NO;
        return returnImage;
    }
    else
    {
        kAppIsProcessingImage = NO;
        return self;
    }
}

在CustomFilter类中：

- (id)initWithLookupImageName:(NSString*)imageName
{
    if (!(self = [super init]))
    {
        return nil;
    }
    _imageName = imageName;
    NSString* cachesDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
    NSString *imagesPath = [cachesDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"lookupimages/%@",_imageName]];

    @try {        
        UIImage* image = [UIImage imageWithContentsOfFile:imagesPath];

        lookupImageSource = [[GPUImagePicture alloc] initWithImage:image];
        GPUImageLookupFilter *lookupFilter = [[GPUImageLookupFilter alloc] init];
        [self addFilter:lookupFilter];

        [lookupImageSource addTarget:lookupFilter atTextureLocation:1];
        [lookupImageSource processImage];

        self.initialFilters = [NSArray arrayWithObjects:lookupFilter, nil];
        self.terminalFilter = lookupFilter;

        return self;
    }
    @catch (NSException *exception) {
        // fatal error happened here uh oh!
        return self;
    }
}

Answer 1

看起来这已在GPUImage中修复但尚未发布。 0.1.5不包含此提交。以下是提交的链接：https://github.com/BradLarson/GPUImage/commit/423ff362727bf8a1eb71451b4c26b39bcc9187cb

以下是问题主题，已关闭：https://github.com/BradLarson/GPUImage/issues/1472

如果要在podfile中指定最新提交，请使用以下命令：

pod 'GPUImage', :git => 'https://github.com/BradLarson/GPUImage.git'

GPUImage在模拟器中崩溃，在设备上并不多

1 个答案: